Forgot to make grub.cfg now what?

Ok so went through the whole install and just forgot to make a grub.cfg file at the end. how can i do this now? I am having som much problems with mdadm and raid right now its unbelievable. i have a raid for my boot and root partitions. I know if i could reassemble the raids in the live cd i can just re chroot back in and generate a grub.cfg. if i run mdadm --assemble it says "/md1 is not in the config file" if i run mdadm --creatwe it says the devices are busy?